Hatoshi: Mom I want to be a demon Slayer when I grow up
Mon: why son
Hatoshi: because I want to destroy all the demon in the world so I can bring balance to the world
Mom: if you really want to bring balance to the world you need to be strong than the high order themselves
Hatoshi: Mom who are the high order?
Mom: they are our creator and owner's of the universe, so if you want to be as powerful as them dear
Hatoshi: I promise to be more strong than them
Mom: it impossible for mortals to be as powerful as there creator,but in history there is only one man who was reborn true pain and wage war against the high order